(Canadian slang, noun) Individual eager to demonstrate knowledge or participate enthusiastically in school, church, seminars, etc. Like nerd, geek, brown-noser, smartypants, etc. but with more emphasis on willingness and enthusiasm, and less on social inadequacy, sycophancy, or natural ability.

Sally's classmates thought she was a keener because she always put her hand up in Chemistry, but her friends knew she had a crush on Mr. Smith.

A: I finished all the homework for next week.
B: Don't be such a keener! You're making the rest of us look bad!

An individual obsessed with academic performance. This person treats every assignment, quiz, and test as if it were a life and death situation. It is imperative for a keener to receive straight A's in every class. If a keener receives a mark less than an A, said keener will wallow in a pool of self-pity and depression. However, keeners quickly recover by doubling their efforts in an attempt to redeem themselves of this failure.

Keeners also exhibit chronic habits which make them easy to spot. A keener will have intense feelings of anxiety about an upcoming test 3 months in advance and then proceed to receive an A later. Keeners also have a calculator at all times in order to calculate their GPA at any given moment in order to reassure themselves that they will receive an A in the course. A keener also possesses the lightning reflexes of a black mamba in order to raise their hand at an astonishing speed to answer any question that the teacher may ask in order to demonstrate their mental prowess. But most important of all, a keener is one that is enthusiastic about learning more than anything else.

Jessica: OH MY GOD! The final is going to be so hard! I'm going to fail this course!! I need to start studying now!

Me: Uhh...classes haven't even started yet and you and I both know you're going to ace this course, you're such a keener.

Keener is a Canadian slang term used to describe someone who is overly eager to learn and prove themselves. Can sometimes be considered to describe a suck up too. Simply words are nerd, geek, smartypants, etc. The only difference is that there is less emphasis on social standing and natural ability. Also, the word puts more emphasis on enthusiasm, willingness, and over all attitude.

A: Cindy is such a keener, she raised her hand for every question in Mr. Willison's class.

B: I know, she gets an A on every single test, and she freaks out when she doesn't.

An individual that is obessessed with homework yet still finds time to party it up and party they do.

It's a Friday night and Jaymie is drunk, but the party is dying down so they pull out their homework. Therefore Jaymie is a keener.
OR
"I was studying for fun earlier let's get plastered now!" < that would be a keener talking or Jaymie
OR
"You're a keener" or "What a keener" (refering to jaymie or taylor)
OR
"WTH Taylor is on the principals list but got so drunk that her hangover resulted in taking half an hour to walk a block and sitting in 5 different puddles along the way" TAYLOR WOULD BE A KEENER.